Valve structure for internal combustion engines



lMarch l2, 1935.

C. E. BERSTLER VALVE STRUCTURE FOR INTERNAL COMBUSTION ENGINES Filed Aug. '7, 1934 VENTOR. Car] 562:5 r

ATTORNEY.

Patented Mar. 12K, 1935 Applicaties August g#1,]19321, serial No. 738,802'

' reinas.; (cime- 188) Y L This invention relates toa valve structure `for internal combustionengine and its primary object resides in the novel-manner of forming, inclir'iing"k and .positioning thenvalve surface or'faces 5` sothat: duplexyalve seatswill be..provided in a' unique arrangement for assuring. perfect seatffV ing anda more .-e'icient de'sigr1l`of'gas passage forr increasing the efficiencyof theengine.

An object ofthe invention resides in the' particular relative'inclination of the valve 'faces and valve surfaces for providingrfa 'gas passage 'of 2() degree valve surface, and providing an annular channel at the point of juncture of the surfaces so that Warpage will be eliminated. and a better seating action created between the valve head and the valve seat of the engine casing.

Another feature of my invention resides in the location of the 20 degreeV valve face at the outer annular surface ofthe valve head so that in the action of the valve head the outer portionv of the gas passage will be of larger capacity than the inner portion for facilitating the passage of gases.

Besides the above, my inventionv is `distinguished in the corelation of valve faces of differ ent degrees of inclination Vso that any tendency of one face to warp is counteracted by the warping tendency of the other face, thus not only eliminating the tendency ofthe valve to Warp but assuring'positive seating of at least one valve face at all times.

With these and other objects in View, my invention will be better understood from the following detailed description taken lin connection with the accompanying drawing, wherein:

Figure 1 is a vertical'sectional view showing my improved valve in applied positon.

Figure 2 is an enlarged sectional view of the valve head in applied position.

Figure 3 is a horizontal view of the valve. A

Figure 4 is a detail sectional view. Referring to the drawing, the numeral 1designates a valve casing having a valve seat (2) with lize the usual 45 degree type of valve seat now' in use.

The principal feature of my invention resides in providing the valve seat (2) and the valve Yof the two surfaces.

'to a minimum.

head (5)` eachwith duplex seat surfaces,v or seat faces, which arey relatively positioned and designed to assure Vproper seating of the valve hea and reduction in the warpagethereof.

, v'To-accomplish this desired result, the'vaveY 5,

seat (2) is designed to provide an inner seatsuri face (6) and an outer seat surface (7), the' formerY Vextendingv at a 45 degree angle'in relation to the axis of the stem (4) andthe latter extending. at a 20 degree inclination .in relation to the 10 axis ofthe stem (4). I wish it to be understood that' the degreeof inclination ofthe seat surf face (7) may bechanged provided there is maintained a difference in the degree of inclination The head (5) is provided with ,duplex valve faces (8 and 9), the inner face (8) extendingat a 45 degree angle to the axis of the stem (4) and the outer face (9) extending at a 20 degree vangle in relation to the axis ofthe stem (4). The face (8) coacts with the seat surface (6) and the face (9) coacts with the seat surface (7), At the point of juncture of the faces (8 and 9) there is arranged a channel (l0) that separates the valve faces for assuring proper `contacting action between the seat surfaces and the valve faces and, further, provide a certain degree of flexibility between the valve faces of the valve head and the valve surfaces of the casing, to assure proper seating and, further, minimize warping.

Due to the relatively different degrees of incli- Y nation of the seat surfaces and valve faces and their relative arrangement, I accomplish in the opening of the valve a gas passage (11) of vary-V ing widths, that is to say, this passage (1l) is provided' with an inner chamber (12) Vof'lessV width thanits outer chamber (13), so that in the movement of the valve head vertically, as indicated by the arrow (14), the valve faces (8 and 9)` willV be spaced different distances from the seat surfaces (6 and 7), as clearly shown in Figure 4. There is a decided advantage in this construction, as greater freedom to the passage of gases is accomplished and back pressures reduced I have found from actual tests with my valve structure that warping of the valve head is vpractically eliminated, and eflicient, eiective seating of the valve is assured under alloperating conditions. I have also' found that I can obtain higher compression, a reduction in gasoline consumption, andthe elimination of burnt valve surfaces.

Due to the relative arrangement of the seat surfaces and Valve faces, the valve is capable of readjusting its seating action in the accumula- V tion `of carbon upon the seat surface and the The diierence in degrees of incli,

valve faces. v nation vof the seat surfaces and valve faces and `their relative arrangement neutralizes any tendency of the head'to Warp and, besides, any slight tendency ofthe valve to Warp is compensated for by the fact that'the inner valve face kvvill tendV to l, Warp under diierent conditions-than theouter valve face, thereby enabling onevalve face to counteract the warping action of the outer valve face under varying conditions; l

Having described my invention,V what VI claim isz- 1. A valve structure comprising a casing having a valve seat and a valve head, said valvek head havinga valve seat coacting With the'seat of said casing, the valve seat of said casing consisting'of an inner valve surface extending at a 45 degree angle and an outer valve surface extending at a 20 degree angle, said valve seat of said head consisting of inner valve face extend-'- ing at a'45 degree angle and coacting with the inner seat surface of saidfcasing valve seat, and

axis of the valve stem. Y:

20 degree angle, said valve seat of said headcon-fv sisting of inner valvel face extendingV at a. 45 dei-V,

gree angle and coacting With the inner seat surface of said casing'valve seat, and an mter'va1vef face extending at Va`f20 degregangle'andccacting with the outer seat surface cf said casing-valve i, y

seat, said valve head being further provided with an annular Vchannel at' the point of junctureof g 'Y Y the inner andv outer valve faces.

3, A-valve comprising a 'stem anda circularlyilo f shaped head having an angular channelV formed Vin the 'head concentrically ofjsaid stem andginy close `relation to the outer annularV surface off I the valve head,v said head having an annular l inner valve face extending at a 45 degree angle toJ the axis of Vsaid stem and an annular outer valve face Vextending at a 20 degree angle to the axis of said stem and extending from the saidchannell- 1 tothe outer annular surface of the valve head.Vl

4. A valve structure comprising in comrlinationl aV valve `seat having angularly related duplex valve surfaces, a -valve yhead havingV angularly',

related duplex valve faces complementary-Vtothe"V angularly related duplex surfaces o'nirsaidfi/"alvev f seat, and a Vstem projecting upwardly fromthe ferent angular degrees Y of inclination in vrelation degrees of inclination to each other andfto'the o `2`5 valve head, said valve .surfacesA extending at Y i `to eachother' and .to the axis offsaid stempand.' Y said valve facesextending at,diie`rent angular 

